PDF malware analysis — malicious · efa2114a171696b6

MALICIOUS

PDF

154.1 KB Created: 2021-09-01 13:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: adab4a7f411a536a91eccdfdb06af253 SHA-1: 9e5053e14ca9683552e9c658502a46fe77d583ec SHA-256: efa2114a171696b6194f1109d400a90a72a67cc2f421983326e856c5d0a49dd8

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains multiple URLs pointing to compromised CMS upload directories, suggesting a link farm designed to obscure the true destination. The presence of these links indicates an attempt to lure users to potentially malicious or phishing content.

Machine Learning

Nyx PDF Classifier malicious score 0.8292

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/nmr0gh76k963klm6gmsgi5be6f/daxozukuwumegorojor.pdf In PDF document text
- https://fitness-sport.it/userfiles/file/tukudidabatewizo.pdfIn PDF document text
- https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/8knkuuvuovia0mptil2k9j96cl/32846838514.pdfIn PDF document text
- http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/77960080441.pdfIn PDF document text
- http://dr-onesrl.com/userfiles/files/16458253188.pdfIn PDF document text
- https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa190eb81b6---10933519046.pdfIn PDF document text
- https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b4948a31ec4---74809463422.pdfIn PDF document text
- http://luingpyrex.cz/foto/Image/file/jilujusulotulijifupade.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091c24a573d2---beponukukaj.pdfIn PDF document text
- http://ozdesignhouse.com/app/webroot/uploads/files/13216908571.pdfIn PDF document text
- http://standartbio.com/fckfiles/file/26315182700.pdfIn PDF document text
- http://foxgraphics.paulsfashion.in/files/xufepexugibiwibar.pdfIn PDF document text
- https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc37fe7ba3---41528646324.pdfIn PDF document text
- http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/94641e86b0e8c0e6de0f771da0437beb/77716306929.pdfIn PDF document text
- http://dptour.net/bot/ckfinder/uf/files/11073669915.pdfIn PDF document text
- http://haphadoor.com/upload/files/finujowu.pdfIn PDF document text
- http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0a2b66bd---laxipilebise.pdfIn PDF document text
- http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085ea7d02e44---8757382856.pdfIn PDF document text
- http://piqiso.ru/userfiles/file/32497521072.pdfIn PDF document text
- http://slovbau.sk/test/userfiles/file/26169791583.pdfIn PDF document text
- http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f52f9aa719---lajuwejonal.pdfIn PDF document text
- http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d656b9c12---16984019176.pdfIn PDF document text
- https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082943a9f599---jelibiwijapejuze.pdfIn PDF document text
- http://ersatzmonitor.de/userfiles/file/lonurugato.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=computer+organization+and+architecture+william+stallings+8th+editionPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00021cdd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x21CDD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000234f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x234F4	11448 bytes
SHA-256: `ca01c4529aebe52c5a8d2a9d9600402e9632bce870215b7e695575355cde7588`

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